package com.itheima.sh.a_dobug_01;

public class ArrayDemo02 {
    public static void main(String[] args) {
        int []arr={100,10,20,30,1000};
        System.out.println(arr[4]);

        arr[3]=300;
        System.out.println(arr[3]);

        System.out.println(arr.length);
    }
}
